stock, 1.325v (cpuz says 1.28v?), I tried before to go over 3.0 in a different rig, wouldn't, but it may have been bad ram (its on RMA now)
I used to have to bump it up to get it to 2.66, now its been 4 hours orthos stable at stock everyhting, only diff is the 1066 ram (1:1 now).

this is in a sonataIII with a katana2 HSF, not cutting edge but 30 idle and 53 load after 4 hours seems ok, its just about 20* higher than my TRUE/900 setup downstairs...

well, 8 hours Orthos stable (then my wife told me she wanted her PC back), so I guess it was the RAM, I bought new stuff while the old is out on RMA, so I guess I will just sell it when it comes in, RMA is great, but it takes too long

It benches almost the same as my e6750 so I am happy, not bad for a web surfing PC